Honour prefix in wireshark install dir
Honour prefix in wireshark install dir

Trying to run

  $ ./configure --prefix=$HOME/usr/libvirt-git
  $ make install

results in libvirt trying to install in /usr/lib/wireshark/plugins/....
with predictable amounts of fail. The configure script should not be
hardcoding /usr/lib by default but rather honour $libdir

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

fabianfreyer/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,agx/libvirt,libvirt/libvirt,rlaager/libvirt,olafhering/libvirt,shugaoye/libvirt,jardasgit/libvirt,jardasgit/libvirt,crobinso/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,elmarco/libvirt,taget/libvirt,agx/libvirt,zippy2/libvirt,nertpinx/libvirt,datto/libvirt,libvirt/libvirt,rlaager/libvirt,nertpinx/libvirt,crobinso/libvirt,taget/libvirt,rlaager/libvirt,fabianfreyer/libvirt,rlaager/libvirt,elmarco/libvirt,eskultety/libvirt,andreabolognani/libvirt,zippy2/libvirt,olafhering/libvirt,jfehlig/libvirt,datto/libvirt,jardasgit/libvirt,jfehlig/libvirt,libvirt/libvirt,taget/libvirt,shugaoye/libvirt,elmarco/libvirt,jardasgit/libvirt,andreabolognani/libvirt,elmarco/libvirt,VenkatDatta/libvirt,elmarco/libvirt,taget/libvirt,datto/libvirt,andreabolognani/libvirt,nertpinx/libvirt,taget/libvirt,agx/libvirt,agx/libvirt,crobinso/libvirt,zippy2/libvirt,eskultety/libvirt,datto/libvirt,datto/libvirt,fabianfreyer/libvirt,crobinso/libvirt,VenkatDatta/libvirt,shugaoye/libvirt,jfehlig/libvirt,andreabolognani/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,eskultety/libvirt,libvirt/libvirt,agx/libvirt,olafhering/libvirt,rlaager/libvirt,VenkatDatta/libvirt,nertpinx/libvirt,eskultety/libvirt,jardasgit/libvirt